#include<stdio.h>
#include<string.h>
#include<stdlib.h>

int z = 9;
int a;
static int b = 10;
static int c;
void swap(int *x, int *y)
{
	int temp;
	temp = *x;
	*x = *y;
	*y = temp;
}

int main()
{
	int x = 4, y = 5;
	swap(&x,&y);
	printf("x=%d,y=%d,z=%d,w=%d",x,y,z,b);
	return 0;
}
